计算过程如下:3/4×37+640×75-3/4=3/4×37-3/4+640×75=3/4(37-1)+640×75=3/4×36+640×75=3×9+640×75=27+640×75=27+48000=48027望采纳。
3/4*37+640*75-3/4=0.75*37+640*75-0.75=75*0.37+640-0.75=(640+0.37)*75-0.75=640.37*75-0.75=48027.75-0.75=48027